Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ace07c463a3eed1cdd320442e9ed0b540e429538818a9b5b6da58aac7176b62f' 
  AND token = '3haDhMAUIo8MiFAXnffeqje+zwM6O/qwK3GeKXg27as=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}